#!/bin/bash

set -e

os="$1"

suffix="$2"

shift 2

inputs="$@"

OBJCOPY="${OBJCOPY:-objcopy}"

OBJDUMP="${OBJDUMP:-objdump}"

STRIP="${STRIP:-strip}"

function extract_linux_or_android {

for input in "$@" ; do

output="${input}${suffix}"

# The --preserve-dates flag for strip and objcopy only has whole

# second resolution, so save the timestamps in a separate file

# instead.

touch -m -r "$input" "$input.timestamps"

# Extract a copy of the debugging information

$OBJCOPY --only-keep-debug "$input" "$output"

if [ "$os" == "android" -a "$BUILDTYPE" == "Debug" ] ; then

echo Skipping strip-debug for ${input}

else

# Because we export symbols from the engine, only debug symbols

# should be stripped.

$STRIP -x --strip-debug "$input"

fi

# Add a hint for the debugger so it can find the debug info

$OBJCOPY --remove-section=.gnu_debuglink "$input"

$OBJCOPY --add-gnu-debuglink="$output" "$input"

# Restore the original modification time

touch -m -r "$input.timestamps" "$input"

rm "$input.timestamps" 2>&1

done

}

function extract_emscripten {

for input in "$@" ; do

touch "${input}${suffix}"

done

}

function extract_mac_or_ios {

for input in "$@" ; do

output="${input}${suffix}"

# If this is an app bundle, find the executable name

if [ -f "${input}/Contents/Info.plist" ] ; then

executable=$(/usr/libexec/PlistBuddy -c "Print CFBundleExecutable" "${input}/Contents/Info.plist")

if [ $? -eq 0 ] ; then

real_input="${input}/Contents/MacOS/${executable}"

else

echo >&2 Cannot find executable for bundle "${input}" \(no CFBundleExecutable key in plist\)

exit 1

fi

else

real_input="${input}"

fi

# If the OS is iOS and this is a debug build, do nothing

if [ "$os" == "ios" -a "$BUILDTYPE" == "Debug" ] ; then

echo Creating empty debug symbols file for ${input}

touch "${output}"

else

# Extract a copy of the debugging information

echo Extracting debug symbols for ${input}

dsymutil --out "${output}" "${real_input}"

# Strip the executable

$STRIP -x -S "$real_input"

fi

done

}

case $os in

linux|android)

extract_linux_or_android ${inputs}

;;

mac|ios)

extract_mac_or_ios ${inputs}

;;

emscripten)

extract_emscripten ${inputs}

;;

*)

echo OS "$os" not supported by this script

exit 1

;;

esac